Hi my girlfriend is having a pimple on her face

Patient: Hi my girlfriend is having a pimple on her face that is not going away and it has been more than a month. How to get it cured and also will the mark remain forever.Also yesterday she saw a amll whitehead on that pimple and tried to rub it and now today it has grown in size.Kindly suggest what are the remedies and what should she apply on it?

Symptoms: Skin problem, Acne

Images:
Hi my girlfriend is having ...-1

Doctor: